This document is a preview generated by EVS

Size: px

Start display at page:

Download "This document is a preview generated by EVS"

Randolf Shepherd
6 years ago
Views:

1 EESTI STANDARD EVS-EN :2017 performance of buildings - Method for calculation of the design heat load - Part 3: Domestic hot water systems heat load and characterisation of needs, Module M8-2, M8-3

2 EVS-EN :2017 EESTI STANDARDI EESSÕNA NATIONAL FOREWORD See Eesti standard EVS-EN :2017 sisaldab Euroopa standardi EN :2017 ingliskeelset teksti. This Estonian standard EVS-EN :2017 consists of the English text of the European standard EN :2017. Standard on jõustunud sellekohase teate avaldamisega EVS Teatajas. Euroopa standardimisorganisatsioonid on teinud Euroopa standardi rahvuslikele liikmetele kättesaadavaks Standard on kättesaadav Eesti Standardikeskusest. This standard has been endorsed with a notification published in the official bulletin of the Estonian Centre for Standardisation. Date of Availability of the European standard is The standard is available from the Estonian Centre for Standardisation. Tagasisidet standardi sisu kohta on võimalik edastada, kasutades EVS-i veebilehel asuvat tagasiside vormi või saates e-kirja meiliaadressile standardiosakond@evs.ee. ICS , Standardite reprodutseerimise ja levitamise õigus kuulub Eesti Standardikeskusele Andmete paljundamine, taastekitamine, kopeerimine, salvestamine elektroonsesse süsteemi või edastamine ükskõik millises vormis või millisel teel ilma Eesti Standardikeskuse kirjaliku loata on keelatud. Kui Teil on küsimusi standardite autorikaitse kohta, võtke palun ühendust Eesti Standardikeskusega: Koduleht telefon ; e-post info@evs.ee The right to reproduce and distribute standards belongs to the Estonian Centre for Standardisation No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, without a written permission from the Estonian Centre for Standardisation. If you have any questions about copyright, please contact Estonian Centre for Standardisation: Homepage phone ; info@evs.ee

3 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN July 2017 ICS ; Supersedes EN :2007 English Version performance of buildings - Method for calculation of the design heat load - Part 3: Domestic hot water systems heat load and characterisation of needs, Module M8-2, M8-3 énergétique des bâtiments - Méthode de calcul des déperditions calorifiques de base - Partie 3 : Charge thermique des systèmes de production d'eau chaude sanitaire et caractérisation des besoins, Module M8-2, M8-3 Energetische Bewertung von Gebäuden - Verfahren zur Berechnung der Energieanforderungen und Nutzungsgrade der Anlagen - Teil 3: Dimensionierung von Trinkwassererwärmungsanlagen und Bedarfsbestimmung, Modul M8-2, M8-3 This European Standard was approved by CEN on 27 February CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN :2017 E

4 Contents European foreword... 4 Introduction Scope Normative references Terms and definitions Symbols and abbreviations Symbols Subscripts Description of the methods General description of the method for sizing domestic hot water systems General description of the methods for calculating the energy needs for domestic hot water Calculation procedures Output data Calculation time steps Input data General Product data System design data Operating data and boundary Other data Calculation procedure for sizing domestic hot water systems Calculation of the energy needs curve for DHW supply Procedure for dimensioning the DHW system Calculation procedure for determining the energy needs for domestic hot water need for domestic hot water based on draw-off or load profiles need for domestic hot water based on volume required need for domestic hot water based directly on floor area Tabulated energy need for domestic hot water Quality control Compliance check Annex A (normative) Template for input data A.1 Load profiles A.2 Parameters to calculate energy needs A.3 Parameters for sizing DHW systems A.4 General values Annex B (informative) Default input data B.1 Load profiles B.2 Parameters to calculate energy needs B.3 Parameters for sizing DHW systems B.4 General values Page 2

5 Bibliography

6 European foreword This document (EN :2017) has been prepared by Technical Committee CEN/TC 228 Heating systems and water based cooling systems in buildings, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2018, and conflicting national standards shall be withdrawn at the latest by January Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN :2007. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. The changes made to the previous edition are minor editorial corrections: a) minor improvement readability of Figure 4; b) correction of an incorrect term in Formula (14); c) correction of an incorrect symbol in Figure 14. EN 12831, performance of buildings Method for the calculation of the design heat load, is composed with the following parts: Part 1: Space heating load, Module M3-3; Part 2: Explanation and justification of EN , Module M3-3 [CEN/TR]; Part 3: Domestic hot water systems heat load and characterisation of needs, Module M8-2, M8-3; Part 4: Explanation and justification of EN , Module M8-2, M8-3 [CEN/TR]. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 4

7 Introduction CEN/TC 228 deals with heating systems in buildings. Subjects covered by CEN/TC 228 are: energy performance calculation for heating systems; inspection of heating systems; design of heating systems; installation and commissioning of heating systems. This European Standard was developed to cover hourly and minutely time-steps. This European Standard is part of a series of standards aiming at international harmonization of the methodology for the assessment of the energy performance of buildings, called set of EPB standards. All EPB standards follow specific rules to ensure overall consistency, unambiguity and transparency. All EPB standards provide a certain flexibility with regard to the methods, the required input data and references to other EPB standards, by the introduction of a normative template in Annex A and Annex B with informative default choices. For the correct use of this standard a normative template is given in Annex A to specify these choices. Informative default choices are provided in Annex B. Use by or for regulators: In case the standard is used in the context of national or regional legal requirements, mandatory choices may be given at national or regional level for such specific applications. These choices (either the informative default choices from Annex B or choices adapted to national / regional needs, but in any case following the template of this Annex A) can be made available as national annex or as separate (e.g. legal) document (national data sheet). NOTE So in this case: the regulators will specify the choices; the individual user will apply the standard to assess the energy performance of a building, and thereby use the choices made by the regulators. Topics addressed in this standard can be subject to public regulation. Public regulation on the same topics can override the default values in Annex B of this standard. Public regulation on the same topics can even, for certain applications, override the use of this standard. Legal requirements and choices are in general not published in standards but in legal documents. In order to avoid double publications and difficult updating of double documents, a national annex may refer to the legal texts where national choices have been made by public authorities. Different national annexes or national data sheets are possible, for different applications. It is expected, if the default values, choices and references to other EPB standards in Annex B are not followed due to national regulations, policy or traditions, that: national or regional authorities prepare data sheets containing the choices and national or regional values, according to the model in Annex A. In this case the national annex (e.g. NA) refers to this text; or, by default, the national standards body will consider the possibility to add or include a national annex in agreement with the template of Annex A, in accordance to the legal documents that give national or regional values and choices. 5

8 Further target groups are parties wanting to motivate their assumptions by classifying the building energy performance for a dedicated building stock. More information is provided in the Technical Report accompanying this standard (EN ). 6

9 1 Scope This European Standard describes a method to calculate the power and the storage volume required for the dimensioning of domestic hot water systems (DHW). The applicability ranges from direct water heaters (no storage volume and a comparatively large effective heating power) to larger storage systems with a comparatively small heating power and large storage volumes. This European Standard is applicable to the following water storage systems: storage systems characterized by a minimal mixing zone, (such as stratified charging storage tanks or storage tanks with external heat exchangers): these systems are nominated in this standard as charging storage systems ; storage tank water heaters and warm water storage tanks with a pronounced mixing zone (such as DHW storage tanks with internal heat exchangers), nominated in this standard as mixed storage systems ; and for different uses. The Scope also includes standardization methods for determining the energy need for domestic hot water. This European Standard covers the domestic hot water needs in buildings. The calculation of the energy needs for DHW-Systems applies to residential and non-residential buildings, a building or a zone of a building. Figure 1 shows the relative position of this standard within the set of EPB standards in the context of the modular structure as set out in EN ISO NOTE 1 In CEN ISO/TR the same table can be found, with, for each module, the numbers of the relevant EPB standards and accompanying technical reports that are published or in preparation. NOTE 2 The modules represent EPB standards, although one EPB standard may cover more than one module and one module may be covered by more than one EPB standard, for instance a simplified and a detailed method respectively. See also Clause 2 and Tables A.1 and B.1. Table 1 shows the relative position of this standard within the EPB package of standards. 7

10 Table 1 Position of this standard, within the modular structure of the set of EPB standards EN EVS-EN :2017 (E) Sub module Overarching (as such) Descriptions Descriptions Descriptions Heating Cooling Ventilation Technical Systems Humidif ication Dehumidifi cation Domestic Hot water Lighting automation and control sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 1 General General General Common terms and definitions; symbols, units and subscripts 3 Applications Ways to Express categories and Boundaries Occupancy and Operating Conditions Aggregation of Services and Carriers Needs (Free) Indoor Conditions without Systems Ways to Express Heat Transfer by Transmission Heat Transfer by Infiltration and Ventilation Internal Heat Gains Needs Maximum Load and Power Ways to Express Emission and control Distribution and control Storage and control Electricity production 8

11 9 Sub module Overarching (as such) Descriptions Descriptions Descriptions Heating Cooling Ventilation Technical Systems Humidif ication Dehumidifi cation Domestic Hot water Lighting automation and control sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M zoning Solar Heat Gains Generation Combustion boilers 8 2 Heat pumps Thermal solar Photovoltaics On-site cogeneration District heating and cooling Direct electrical heater 8 7 Wind turbines Calculated Measured Dynamics (thermal mass) Measured Radiant heating, stoves Load dispatching and operating conditions Measured Electricity production

12 Sub module Overarching (as such) Descriptions Descriptions Descriptions Heating Cooling Ventilation Technical Systems Humidif ication Dehumidifi cation Domestic Hot water Lighting automation and control sub1 M1 M2 M3 M4 M5 M6 M7 M8 M9 M10 M11 11 Inspection Inspection Inspection Ways to Express Indoor Comfort External Environment Conditions Economic Calculation NOTE The shaded modules are not applicable. BMS Electricity production 10

13 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12897, Water supply Specification for indirectly heated unvented (closed) storage water heaters EN 50440, Efficiency of domestic electrical storage water heaters and testing methods EN ISO :2017, performance of buildings Overarching EPB assessment Part 1: General framework and procedures (ISO :2017) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO :2017 and the following apply. 3.1 energy storage tank storage tank for providing thermal energy amongst others for use in domestic hot water systems (DHW) Note 1 to entry: The storage medium is not potable water. 3.2 centralized DHW system DHW system where water for several building units is heated centrally and then distributed to each building unit 3.3 potable water, cold (PWC) water that has not been heated by the DHW system 3.4 decentralized, individual DHW system DHW System in which PWC is distributed to each draw-off point, dwelling or building unit and then individually heated (e.g. via a separate DHW module), in which case hot water is only distributed within individual building units) Note 1 to entry: In this case, hot water is only distributed within individual building units. 3.5 domestic hot water DHW potable water, the temperature of which has been increased by means of heat transfer Note 1 to entry: In this standard, the term domestic hot water (DHW) is equivalent to the term potable water hot (PWH). The usage of the term DHW also applies to non-domestic buildings and their systems. 3.6 DHW storage tank tank for storage of domestic hot water (DHW) 11

This document is a preview generated by EVS

This document is a preview generated by EVS EESTI STANDARD EVS-EN ISO 19011:2011 Juhtimissüsteemide auditeerimise juhised Guidelines for auditing management systems (ISO 19011:2011) EESTI STANDARDI EESSÕNA NATIONAL FOREWORD See Eesti standard EVS-EN